Ashaway Racket Strings has introduced PowerNickï¿½ 19, the thinnest string ever to grace a squash racquet. The new 1.05 mm string utilizes a monofilament core, based on a special formulation developed for Ashaway by Zyex Limited. Designed to provide improved power and performance for both amateur and professional players, PowerNick 19 provides excellent resilience and response, along with a dramatic increase in the ability to grip, cut, slice, and work the ball.